2018-02-07T22:28:33ZOrigin of methane and light hydrocarbons in natural fluid emissions: A key study from Greecehttp://hdl.handle.net/2122/10680
<strong>Title</strong>: Origin of methane and light hydrocarbons in natural fluid emissions: A key study from Greece
<strong>Authors</strong>: Daskalopoulou, Kyriaki; Calabrese, Sergio; Grassa, Fausto; Kyriakopoulos, Konstantinos; Parello, Francesco; Tassi, Franco; D'Alessandro, Walter
<strong>Abstract</strong>: Greece, a country characterised by intense seismic and volcanic activity, has a complex geodynamic and geological setting that favours the occurrence of many gas manifestations. In this study, we address the origin of CH4 and light hydrocarbons in cold and thermal emissions discharging along the Hellenic territory. Also, we investigate their possible relationship with the main geochemical composition of the gases and the different geological settings of the sampling sites. For this purpose we collected 101 new samples that were analysed for their chemical (O2, N2, CH4, CO2, He, Ne, Ar, H2, H2S and C2-C6 hydrocarbons) and isotopic (R/RA, δ13C-CO2, δ13C-CH4 and δ2H-CH4) composition. Results show that CH4 presents a wide range of concentrations (from<0.5 to 925,200 μmol/mol) and isotopic values (δ13C-CH4 from−79.8 to +45.0‰vs. V-PDB; δ2H-CH4 from−311 to +301‰ vs. V-SMOW). Greece was subdivided in four geologic units (External [EH] and Internal [IH] Hellenides, Hellenic Hinterland [HH] and active Volcanic Arc [VA]) and a decreasing CH4 concentration from EH to HH was recognized, whereas CH4 showed intermediate concentrations in VA. The CH4/(C2H6+C3H8) ratios (from 1.5 to 93,200), coupled with CH4 isotopic features, suggest that the light alkanes derive from different primary sources and are affected by secondary processes. An almost exclusive biotic, mainly microbial, origin of CH4 can be attributed to EH gases. Cold gases at IH have mainly a thermogenic origin, although some gases connected to continental serpentinization may have an abiogenic origin. Methane in gases bubbling in thermal waters of IH, HH and VA and fumarolic gases of the VA seem to have an abiogenic origin, although their chemical and isotopic characteristics may have been produced by secondary oxidation of thermogenic CH4, a process that in some of the sampled gases causes extremely positive isotopic values (δ13C-CH4 up to +45.0‰vs. V-PDB and δ2H-CH4 up to +301‰ vs. V-SMOW).2018-02-01T00:00:00ZBig Data Analytics on Large-Scale Scientific Datasets in the INDIGO-DataCloud Projecthttp://hdl.handle.net/2122/10679
<strong>Title</strong>: Big Data Analytics on Large-Scale Scientific Datasets in the INDIGO-DataCloud Project
<strong>Authors</strong>: Fiore, Sandro; Palazzo, Cosimo; D'Anca, Alessandro; Elia, Donatello; Londero, Elisa; Knapic, Cristina; Monna, Stephen; Marcucci, Nicola Mario; Aguilar, Fernando; Płóciennik, Marcin; De lucas, Jesús E. Marco; Aloisio, Giovanni
<strong>Abstract</strong>: In the context of the EU H2020 INDIGO-DataCloud project several use case on large scale scientfic data analysis regarding different research communities have been implemented. All of them require the availability of large amount of data related to either output of imulations or observed data from sensors and need scientic (big) data solutions to run data analysis experiments. More specically,the paper presents the case studies related to the following research communities: (i) the European Multidisciplinary Seaoor and water column Observatory (INGV-EMSO), (ii) the Large Binocular Tele-scope, (iii) LifeWatch, and (iv) the European Network for Earth System Modelling (ENES).2017-05-15T00:00:00ZThe first Italian blast-induced liquefaction test (Mirabello, Emilia-Romagna, Italy): description of the experiment and preliminary resultshttp://hdl.handle.net/2122/10678
<strong>Title</strong>: The first Italian blast-induced liquefaction test (Mirabello, Emilia-Romagna, Italy): description of the experiment and preliminary results
<strong>Authors</strong>: Amoroso, Sara; Milana, Giuliano; Rollins, Kyle; Comina, Cesare; Minarelli, Luca; Manuel, Maria R.; Monaco, Paola; Franceschini, Marco; Anzidei, Marco; Lusvardi, Cameron; Cantore, Luciana; Carpena, Andrea; Casadei, Stefano; Cinti, Francesca Romana; Civico, Riccardo; Cox, Brady R.; De Martini, Paolo Marco; Di Giulio, Giuseppe; Di Naccio, Deborah; Di Stefano, Giuseppe; Facciorusso, Johann; Famiani, Daniela; Fiorelli, Federico; Fontana, Daniela; Foti, Sebastiano; Madiai, Claudia; Marangoni, Valeria; Marchetti, Diego; Marchetti, Silvano L.; Martelli, Luca; Mariotti, Mauro; Muscolino, Elena; Pancaldi, Davide; Pantosti, Daniela; Passeri, Federico; Pesci, Arianna; Romeo, Giovanni; Sapia, Vincenzo; Smedile, Alessandra; Stefani, Marco; Tarabusi, Gabriele; Teza, Giordano; Vassallo, Maurizio; Villani, Fabio
<strong>Abstract</strong>: Soil liquefaction can result in significant settlement and reduction of
load-bearing capacity. Moreover, the generation of pore pressure during
an earthquake and its post-seismic dissipation can generate permanent
deformations and settlements. The quantitative evaluation of
post-liquefaction settlements is of extreme importance for engineering
purposes, i.e. for earthquake-resistant design of new buildings and
safety evaluation of existing ones. Quantifying the extent of these
phenomena is, however, rather difficult. Uncertainties arise from the
stochastic nature of the earthquake loading, from the simplifications
of soil models, and from the difficulty in establishing correlations between
the pre-earthquake soil state and the post-seismic deformations.
Field scale liquefaction tests, under controlled conditions, are therefore
important for a correct quantification of these phenomena. Recent experiences
(e.g. New Zealand, United States) show that liquefaction
can be induced and monitored with field scale blast tests to study the
related effects on soil geotechnical properties. Within this framework
this paper introduces the preliminary results obtained from a research
project on blast-induced liquefaction at field scale. Tests were performed
at a trial site located in Mirabello (Ferrara, Italy), a village
strongly affected by liquefaction phenomena during the 2012 Emilia
Romagna earthquake. Invasive tests, such as piezocone, seismic dilatometer
and down-hole tests, and non-invasive tests were carried out
before and after the execution of two blast test sequences to study the variation in physical properties of the soils. Pore pressure transducers,
settlement profilometers and accelerometers were installed with the objective
of measuring, during and after the detonations, the generation
and subsequent dissipation of the pore pressure, the vertical deformations,
and the blast-induced ground motions respectively. Variations
in load distribution on deep foundations due to soil liquefaction were
also evaluated on a test micropile instrumented with a strain gauge
array. Topographical surveys were carried out to measure ground surface
settlements. Laboratory tests and trenches also provided increased
understanding of the site characteristics.2017-01-01T00:00:00ZIntegrazione di dati laser scanning e fotogrammetrici per il monitoraggio delle coste: i primi rilievi TLS terrestri per il progetto SCANCOASThttp://hdl.handle.net/2122/10677
<strong>Title</strong>: Integrazione di dati laser scanning e fotogrammetrici per il monitoraggio delle coste: i primi rilievi TLS terrestri per il progetto SCANCOAST
<strong>Authors</strong>: Pesci, Arianna; Stefanelli, Paolo; Bisson, Marina; Muccini, Filippo; Carmisciano, Cosmo
<strong>Abstract</strong>: Il lavoro descritto in questo rapporto tecnico è parte integrante del programma operativo del progetto
SCANCOAST, pensato per il monitoraggio di aree costiere e sottomarine condotto mediante l’integrazione
di tecniche di telerilevamento quali Terrestrial Laser Scanning (TLS), fotogrammetria digitale e multibeam
interferometrico.2016-01-01T00:00:00Z